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General Purpose Refractories
(A) Chemical Analysis
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25% Al2O3
LHD
|
30% Al2O3
MHF
|
40% Al2O3
HHD
|
| Al2O3 |
25% - 27%
|
28% - 32%
|
38% - 40%
|
| Fe2O3 |
1.50%
|
1.65%
|
1.76%
|
CaO
|
1.10%
|
1.20%
|
1.30%
|
TiO
|
2.20%
|
2.40%
|
2.90%
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(B) Physical Properties
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Pyrometric cone Equivalent Orton
|
27
|
30
|
32
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Average Balk Density g/cm3
|
1.96 - 1.97
|
1.98 - 2.00
|
2.00 - 2.10
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Refractoriess under Load-a value
|
1300oC - 1350oC |
1350oC - 1400oC |
Min. - 1400oC |
PLCR at 1400oC (for 2hrsi %
|
Max. - 1.0
|
Max. - 1.0 |
Max. - 1.0 |
Cold crushing strength kg/cm2
|
180
|
200
|
250 - 300
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Tolerance on size
Varistion from specified dimension cowing back werpage and shrinkage shall be alloed to the extent +/-1.5 - 2% whichever is greater.
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